A handcuffed Iskandar, who wore a dark-coloured T-shirt in court, appeared calm when the charges were read to him. He glanced at the public gallery occassionally.

The case will be mentioned again on Monday and Iskandar will be remanded at the Central Police Division.

He will also be brought back to the crime scene for another re-enactment, the court heard.

Last Wednesday, Mr Tan Boon Sin was found dead in his Hillside Drive terrace house. His elder son's body was found about 1km away, at a taxi stand outside Kovan Station in Upper Serangoon Road.

Iskandar, a 14-year veteran and member of the Bedok Police Division, was a commended officer who had been featured on the police website.

He was declared a bankrupt last Thursday, a day after the murders.

Police said Iskandar was "formally interdicted from service" yesterday. This means he is still employed by the police, but cannot perform any duties.

In January, he was removed from his position as an investigation officer and assigned to administrative duties. He was also barred from carrying firearms.

Police said this is because he was facing disciplinary proceedings due to "financial embarrassment".

Police said last week that Mr Tan Boon Sin made a report at Bedok Police Division last November, saying he had been a victim of theft. Iskandar was the duty investigator, but the case was later reassigned to another officer.